/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package th.com.caa.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import java.util.HashMap;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JasperRunManager;

/**
 *
 * @author Ketsaraporn
 */
public class ReportServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {

            byte[] byteout = this.reportWithResultSet(request.getSession().getServletContext().getRealPath("/jrxml/report2.jasper"), new HashMap<String, Object>(), null);
            //--- set program environment ---//
            if (byteout != null) {
//            OutputStream outputStream = response.getOutputStream();
                ServletOutputStream servletOutputStream = response.getOutputStream();
                response.setContentType("application/pdf");
                response.setContentLength(byteout.length);
                //response.setBufferSize(byteout.length);
                servletOutputStream.write(byteout, 0, byteout.length);
                //outputStream.flush();
                //outputStream.close();
                if (servletOutputStream != null) {
                    servletOutputStream.flush();
                    servletOutputStream.close();
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            out.close();
        }
    }

    private byte[] reportWithResultSet(String fileReport, HashMap<String, Object> param, ResultSet rs) throws Exception {
        byte[] bs = null;
        try {

            param.put("PrintDate", "test");
            bs = JasperRunManager.runReportToPdf(fileReport, param);
//            JasperPrint jasperPrint = JasperFillManager.fillReport(fileReport, param);
            JasperRunManager.runReportToPdfFile(fileReport, "C://Users//Ketsaraporn//test123.pdf", param);
//            JasperExportManager.exportReportToHtmlFile(jasperPrint, "C://Users//Ketsaraporn//test123.html");

        } catch (Exception e) {
            e.printStackTrace();
        }

        return bs;
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
